def on_send_gap(match, state):
"""It happens when the writer send a GAP message."""
writer_oid = get_oid(match[0])
remote_part = parse_guid(state, match[1], match[2], match[3])
reader_oid = get_oid(match[4])
sn_start = parse_sn(match[5])
sn_end = parse_sn(match[6])
verb = 1 if is_builtin_entity(match[0]) else 0
log_send(
remote_part, writer_oid,
"Sent GAP to reader %s for [%d, %d)" % (reader_oid, sn_start, sn_end),
state, verb)
add_statistics_packet(writer_oid, 'send', 'GAP', state)
# Check for large sequence number issues.
if sn_end - sn_start >= (1 << 31):
log_warning("[LP-1] Large Sequence Number difference in GAP.", state)
# Check for reliable packet lost
if 'packets_lost' not in state:
return
losts = []
for k in state['packets_lost']:
info = k.split("-")
oid = info[0]
seqnum = int(info[1])
if oid == writer_oid and seqnum >= sn_start and seqnum < sn_end:
log_warning("DATA (%d) may have been lost" % seqnum, state)
losts.append(k)
for k in losts:
state['packets_lost'].remove(k)
def on_receive_data(match, state):
"""It happens when the reader receives data."""
comm = "best-effort" if match[0] == "Be" else "reliable"
reader_oid = get_oid(match[1])
packet = match[2]
seqnum = parse_sn(match[3], 16 if match[0] == "Be" else 10)
remote = match[5].split('.')
writer_addr = parse_guid(state, remote[0], remote[1], remote[2])
writer_oid = get_oid(remote[3])
# Sequece number check
full_id = writer_addr + "." + writer_oid + ' to ' + reader_oid
if 'last_sn' not in state:
state['last_sn'] = {}
if full_id in state['last_sn']:
prev_seqnum = state['last_sn'][full_id]
diff = seqnum - prev_seqnum
# Add a warning message per missing packet to have a good count in
# the warning summary.
for _ in range(diff - 1):
log_warning("Missing packet for %s" % full_id, state)
state['last_sn'][full_id] = seqnum
# Show the message after any possible warning.
verb = 1 if is_builtin_entity(remote[3]) else 0
log_recv(
writer_addr, reader_oid, "Received %s (%d) from writer %s (%s)" %
(packet, seqnum, writer_oid, comm), state, verb)
def on_send_hb_response(match, state):
"""It happens when sending a HB response."""
writer_oid = get_oid(match[0])
sn_end = parse_sn(match[1])
sn_start = parse_sn(match[2])
verb = 1 if is_builtin_entity(match[0]) else 0
log_send("", writer_oid,
"Sent HB response for [%d, %d]" % (sn_start, sn_end), state, verb)
def on_send_preemptive_hb(match, state):
"""It happens when sending a preemptive HB message."""
writer_oid = get_oid(match[0])
sn_start = parse_sn(match[1])
sn_end = parse_sn(match[2])
verb = 1 if is_builtin_entity(match[0]) else 0
log_send("", writer_oid,
"Sent preemptive HB for [%d, %d]" % (sn_start, sn_end), state,
verb)
def on_send_preemptive_gap(match, state):
"""It happens when sending a preemptive GAP message."""
writer_oid = get_oid(match[0])
reader_addr = parse_guid(state, match[1], match[2], match[3])
reader_oid = get_oid(match[4])
verb = 1 if is_builtin_entity(match[0]) else 0
log_send(reader_addr, writer_oid,
"Sent preemptive GAP to volatile reader %s" % (reader_oid), state,
verb)
def on_send_piggyback_hb(match, state):
"""It happens when sending a piggyback HB message."""
writer_oid = get_oid(match[0])
sn_first = parse_sn(match[1])
sn_last = parse_sn(match[2])
verb = 1 if is_builtin_entity(match[0]) else 0
log_send("", writer_oid,
"Sent PIGGYBACK HB for [%d, %d]" % (sn_first, sn_last), state,
verb)
add_statistics_packet(writer_oid, "send", "PIGGYBACK HB", state)
def on_resend_data(match, state):
"""It happens when the writer resend a DATA message."""
writer_oid = get_oid(match[0])
remote_part = parse_guid(state, match[1], match[2], match[3])
remote_oid = get_oid(match[4])
seqnum = parse_sn(match[5])
verb = 1 if is_builtin_entity(match[0]) else 0
log_send(remote_part, writer_oid,
"Resend DATA (%d) to reader %s" % (seqnum, remote_oid), state,
verb)
def on_receive_ack(match, state):
"""It happens when receiving an ACK message."""
writer_oid = get_oid(match[0])
remote = match[1].split('.')
reader_addr = parse_guid(state, remote[0], remote[1], remote[2])
reader_oid = get_oid(remote[3])
seqnum = parse_sn(match[2])
verb = 1 if is_builtin_entity(match[0]) else 0
log_recv(reader_addr, writer_oid,
"Received ACKNACK from reader %s for %d" % (reader_oid, seqnum),
state, verb)
def match_entity(match, state):
"""It happens when a specific entity is matched."""
entity2_addr = parse_guid(state, match[0], match[1], match[2])
entity2_oid = get_oid(match[3])
entity1_oid = get_oid(match[4])
verb = 1 if is_builtin_entity(match[4]) else 0
reliable = match[5] # Best-Effort or Reliable
log_process(
entity2_addr, entity1_oid,
"Discovered %s %s %s %s" % (kind, reliable, entity2, entity2_oid),
state, verb)
def on_send_nack(match, state):
"""It happens when a NACK message is sent."""
reader_oid = get_oid(match[0])
lead = parse_sn(match[1])
bitcount = int(match[2])
remote = match[4].split('.')
writer_addr = parse_guid(state, remote[0], remote[1], remote[2])
writer_oid = get_oid(remote[3])
verb = 1 if is_builtin_entity(remote[3]) else 0
log_send(
writer_addr, reader_oid, "Sent NACK to writer %s for %d count %d" %
(writer_oid, lead, bitcount), state, verb)
def on_receive_hb(match, state):
"""It happens when the write receives a HB."""
reader_oid = get_oid(match[0])
sn_start = parse_sn(match[1])
sn_end = parse_sn(match[2])
remote = match[4].split('.')
writer_addr = parse_guid(state, remote[0], remote[1], remote[2])
writer_oid = get_oid(remote[3])
verb = 1 if is_builtin_entity(remote[3]) else 0
log_recv(
writer_addr, reader_oid, "Received HB from writer %s for [%d, %d]" %
(writer_oid, sn_start, sn_end), state, verb)
def on_receive_out_order_data(match, state):
"""It happens when the received data sequence number isn't contiguous."""
reader_oid = get_oid(match[0])
kind = "old" if match[1] == "old" else "future"
seqnum = parse_sn(match[2])
remote = match[3].split('.')
writer_addr = parse_guid(state, remote[0], remote[1], remote[2])
writer_oid = get_oid(remote[3])
verb = 1 if is_builtin_entity(remote[3]) else 0
log_recv(
writer_addr, reader_oid,
"Received %s DATA (%d) from writer %s" % (kind, seqnum, writer_oid),
state, verb)
